Ribbon mechanism for writing-machines.



No.859.294. PATENTED JULY 9, 1907.

E. B. HESS.

RIBBON MECHANISM FOR WRITING MACHINES.

APPLICATION FILED MAR. 30, 1905.

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=No.859.294. i PATENTED JULY9,1907.

E. B, HESS.

RIBBON MECHANISM FOR WRITING MAUHINES. APPLICATION EILED MAR. 30. 1905.

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RIBBON MECHANISM FOR WRITING MACHINES. APPLICATION FILED MAR. 30. 1905.

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unrrsn mass .EDWARD B. HESS, OF NEW YORK, N.

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HOBOKEN, NEW JERSEY, A CORPORATION OF NEW JERSEY.

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Specification of Letters Patent.

v Patented m 9, 1907.

Application am March 30,1905. sash No. 262.819.

To all whom it may concern:

Be it known that I, Enwsan B. Hess, a citizen of the United Statesof America, residing in the borough of Brooklyn, city and State of New York, have in- 5' vented certain new and useful Improvements in Ribbon Mechanism for Writing-Machines, of which the following is a specification.

This invention comprises a new'organization wherein either the right or leftribbon bobbin may, at will, be driven from the geared cover of the spring box, or both be disengaged therefrom to permit manual winding of the ribbon,all as appears from thefollowing description, and from the accompanyingdrawings,'in

which, Y Figure 1 is a top plan view:' Fig 2, a bottom plan view: Fig. 3,-a transverse vertical section on line 3, 3, of Fig. 1: Fig. 4, a longitudinal vertical section on line 4, 4, of Fig. 3: Fig. 5, a detail section of the ratchet device to prevent back winding of the ribbon when the carriage is returned for commencement of a new line of printingz and Fig. 6, a section on 1ine 6, 6, of- Fig. 5.

The spring box-u is properly mounted and provided, as usual, \with a wheel and worm adjusting means b. lts circular cover is provided with ,peripheral gear teeth 0 withwhich meshes a pinion d on a horizontally arranged shaft d. The end of thisshaft has a hearing at d in one arm of the bracket that supports the spring box and has sufficient play to permit slight oscillation of the shaft. The shaft extends toward the front of the machine and is provided at its forward end with a 1 worm e adapted tomesh, when in its depressed position, with a vertically disposed gear f on the end of a transverse shaft f which, through the pair of gears 9,- drives the vertically disposed spindle g of the right hand ribbon bobbin. When the shaft d .is, however,

thrown to its uppermost position, the worm thereon engages a horizontally'disposed gear 71 connected with the vertical spindle g of the left hand ribbon bobbin.

To provide for thesetwof adjustments of the shaft (1 and for an intermediate position thereof which its worm is out of gear with either gear, the front endof the shaft is mounted in the laterally extending arm 11 of a bell crank lever rocking about an axis 1' and whose upwardly extending arm 11 may be actuated in the following manner. On the side'of the upper end of the .arm is pivotally secured an apertured block j. A

downwardly extendingpiri 70 passes loosely through the aperture in the block and 'is secured at the upper end to a rocking arm m pivotally mounted in the bracket n of the left hand ribbon box and having a handle m.

viewed in Fig. 8, the lower lateral arm '5 of the rock upwardly so that the worm e engages the ribbon bobbin spindles,

' 2. In 'a ribbon mechanism for a Bythrowing the handle to the right as By throwing the handle to the left, the upright arm of the bell crank may be thrown over to the right and the lateral arm 5 downwardly to bring the worm 0 into engagementwith the gear f on the transverse shaft f A spring 70 surrounding the pink and bearing upon the block 9' serves tofirmly hold the parts in their described positions. The axis 'i of the bell crank is vertically below the axis of the rocking arm m and, when the upright arm of thebell crank is brought into parallelism with a.line connecting these two axes in which position it will be held by the spring is, the arm tof the bell crank will be held in an intermediate position in which tne'worm e will be out of engagement with both. gears h, f, when the ribbon maybe manually manipulated.

Ribbon guide brackets o, o, secured to the supports provided for the ribbon spool, have their ends disposed at an angle of about forty-five degrees. Such angular edges are turned up vrtically and formed with rib bon guide slots in, as indicated in Fig. 1. These. forked guides serve to direct the ribbon to the printing point at an angle of about forty-five degrees and prevent slackness of the ribbon when the feed is-rapidly operated.

They also serve to keep the ribbon from dropping from the spool. To prevent backward move 8 ment of the ribbon when the carriage is returned to the initial position for printing of a new line, the gear d isconnected with the shaft d by-means of a ratchet (1,

(Fig. 6) inclosed in a cup q arranged between the ratchet wheeld and the end bearing of the shaft.

I claim as my invention: 1. In aribbon mechanism for a writing-machine, the combination-of the spring drum having a rotatable plate formed with gear teeth, an oscillatable shaft having at one end apinion gearing .with the plate, a wormon the opposite end of the shaft, 2; gear adapted to drive one of a gear connected by a driving connection with the other ribbon bobbin spindle and .means for oscillating the shaft to bring it at will into connection with either of said gears.

writing machine, the combination of the spring drum having a rotatable plate formed with gear teeth, an oscillatable shaft having at one end a pinion gearingwith the plate, a worm on the opposite end of the shaft, a the ribbon bobbin spindles, a

gear connected by a driving connection with 'the other ribbon bobbin spindle and" means for oscillating the shaft to at will bring it into connection with either of'said gears and to hold it at will in intermediate position out of engagement-with either gear. V

3 In a ribbon mechanism for a writing machine,'tlie combination with the rotatable part of the spring box 'hav ing peripheral gear teeth, of 'a pinion meshing therewith,

a shaft driven by the pinion, a worm on the shaft, a vertically rocking arm in which the end of the shaft is mounted, a vertically disposed gear, a driving connection between it, and one of the ribbon bobbin spindles, a hori zontally disposed gear-adapted to drive the other ribbon.

bobbin spindle and means for moving the vertically rocklng arm to throw the worm into engagement with either gear adapted to drive one of 1()(} .the horizontally or ,vertically disposed gears to drive at will the spindle of either ribbon bobbin.

4..-ln a ribbon mechanism for a writingmachine, the

combination with the rotatable part of the spring box having peripheral gear teeth, of a pinion meshing therewith,

:a shaft driven by the pinion, a worm on the shaft, a, vertically rocking'arm inlwhich the end ofthe shaft is mounted, a vertically disposed gear, a driving connection between it and one of the ribbon bobbins, a horizontally disposed gear adapted to drive the other .ribbon bobbin spindle, means for moving the vertically rocking arm to throw the worm into engagement with either the horizon- .tally or vertically disposed gears to drive at. will the.

spindle of either ribbon bobbin and means for holding said arm in intermediate position with the worm out of engagement with either of said gears.

5. In a ribbon mechanism for a writing machine, the spring box having a rotatable part with peripheral gear teeth, a pinion gearing therewith, an oscillatableishaft driven by the pinion, a bell cra-nk lever in one arm of which theend of the shaft has a bearing, means for rockingthe other arm of the bell crank lever to oscillate the shaft and gears adapted to respectively drive the spindles of the ribbon bobbins and with either of which the worm may at-will be thrown into engagement. I

6. In a ribbon mechanism for a writing machine, the combination of the spring box having a rotatable part with peripheral gear teeth, a pinion gearing therewith, a

-in the. laterally disposed arm of which said shaft'has a bearing, a rocking pin slidably connected with the upright arm of the bell crank and adapted to rock it in either direction, a spring acting to hold the upright arm of the bell crank in the positions in which it may be set and means whereby the spindle oi one ribbon bobbin may be driven when the oscillatable shaft is in one position and the other ribbon bobbin spindle be driven when -the oscillatabie shaft is in another position.

8. In a ribbon mechanism for a writing machine, the combination of the spring box, an oscillatablo shaft having one end operatively connected therewith and driven thereby, a worm on the shaft, ribbon-bobbin driving gears, one for each bobbin, with either of which said worm may be moved into engagement, and a ratchet and pawl device to prevent back motion of The shaft when the carriage of the'machine is returned to initial position for the printing of a new line.

0. in a writing machine, a ribbon mechanism compris' ing' a pair of ribbon bobbins adapted to be independently driven, their respective driving gears arranged in juxtaposition at an angle to each other, and a laterally movable driven worm adapted to, at will, be thrown into engagement with either of said driving gear 10. In a writing machine, a ribbon mechanism comprising a pair of ribbon bobbins located respectively at opposite sides of the machine. a pair of bobbin driving gears both located at one side of the machine in juxtaposition to each other and operatively connected with their respective bobbins, and a driven adjustable gear adapted, at

will, "to be set in engagement with either of said bobbin driving gears.

In testimony whereof, I have hereunto subscribed my name.

EDWARD B. HESS. Witnesses JOSEPH M. S'iOlJGII'lUN, OSCAR AnnAMs. 

